I'm a Weber fan, but haven' tried the charcoal. At a $1 a pound, not sure I will. If they put it on sale, I'd give it a try. They are really promoting the plastic, weather resistant bag. I solved that problem years ago. Buy a Home Depot bucket and lid for less than $4 and fill it with charcoal. I don't even seal mine completely, just clicking one side. I never get water in them. Works for wood chunks too. I've got something like eight of them in my backyard and they came through our crazy wet and windy California winter/spring without a single leak.
I always break down the cost of the charcoal per pound. Anything over 50 cents a pound just starts adding up too fast when I go through 40-60 lbs a month. One 20+ hour smoke can just about use up an entire 15-20 lb bag of charcoal. At 27 cents / lb on sale, KBB is hard to beat. It's for that reason I keep going back to the KBB sales at Home Depot during early Spring, Memorial Weekend, July 4th, Labor Day, and sometimes Thanksgiving. I'll try anything on sale that totals less than 50 cents a pound. By Memorial Weekend I'll be down to about 60 lbs of charcoal. Time to stock up.
BTW, I REALLY dislike the new KBB formula. I haven't noticed any change in taste, but the ASH! I am absolutely amazed at the amount of ash the new briquettes create once they were reformulated last year or the year before. KBB has always been ash heavy, but now it is ridiculous. It is for that reason I'll be possibly shifting away from KBB in the near future.